Process for producing homopolymers or copolymers of vinyl or vin

Details Process for producing homopolymers or copolymers of vinyl or vin Process for producing homopolymers or copolymers of vinyl or vin

1978-07-31

1980-01-29

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 73, 526173, 526212, 526213, 526227, 526343, 5263442, 526345, 526911, 525 4, C08F 224, C08F 434, C08F 1406, C08F 1408

Patent

active

041862597

ABSTRACT:
The present invention relates to a process for preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous alkaline medium, using an oil-soluble polymerization initiator, at temperatures preferably below about 48.degree. C., in the presence of an emulsifier system comprising the ammonium salt of a high fatty acid containing from 8 to 20 carbon atoms, at least one long straight chain alcohol containing from 14 to 24 carbon atoms, and a sulfate or sulfonate type soap of C.sub.12 to C.sub.20 alkyl or aryl hydrocarbons, wherein the ratio of alcohol to emulsifier is equal to or greater than 1.0 and wherein the reaction ingredients are thoroughly mixed, and preferably homogenized, prior to polymerization. The process produces paste resins having improved plastisol foam properties, especially when sodium metabisulfite is added to the polymer recipe or the polymer slurry prior to spray drying. Further, polymer buildup in the reactor is substantially reduced and multiple polymerizations can be run in the reactor without opening the same.

REFERENCES:
patent: 4029619 (1977-06-01), Tajima et al.
patent: 4071675 (1978-01-01), Yu et al.
patent: 4076920 (1978-02-01), Mikofalvy

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